Lamp



FIG. 1 is a top, front, right side perspective view of a lamp showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a right side elevational view thereof, the left side being a mirror image. 

The ornamental design for a lamp, as shown and described. 